Hard Protective Barrier
Mohs 9 hardness helps resist scratches and wear from dust, cleaning and process exposure that can degrade an ordinary optical cover.
Sapphire Optical Window for High Temperature Industrial Sensor
group nameSapphire Optical Windows
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Min Order5 piece
brand nameFELIX GLASS optical glass Manufacturing base
modelFG-WIN-03
payment methodL/C, D/A, D/P, Western Union
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update timeFri, 17 Jul 2026 16:47:46 GMT
Paramtents
Material Sapphire (Al₂O₃) 1: High Purity Fused Silica 2: Synthetic Single-Crystal
Diameter Range 0.5mm – 200mm
Thickness Range 0.1mm – 30mm
SiO₂ Purity (Quartz) ≥99.99%
Sapphire Purity: 99.99% Al₂O₃
Long-Term Working Temp (Quartz 1100–1200℃
Long-Term Working Temp (Sapphire) ≤1800℃
Thermal Expansion Coefficient (Fused Silica 5.5 × 10⁻⁷ /°C
Sapphire Softening Point 2040℃
Processing Round cutting, edge chamfering, double-sided polishing, mounting hole drilling
Optional Coating IR anti-reflection coating, broadband AR coating, UV enhanced coating
Packging & Delivery
Size50cm x50cm x30cm
Weight0.5kg / piece
Min Order5 piece
Briefing
Custom sapphire windows for high-temperature industrial sensors, with precision polishing and optional AR coatings.
Detailed
A single-crystal sapphire optical window protects sensor optics from heat, abrasion, pressure and corrosive process exposure while maintaining a clear optical path. Felix Glass manufactures custom round, square, rectangular and drawing-defined windows for pyrometers, flame sensors, thermal monitoring, furnace observation and high-temperature process instrumentation. Sapphire remains mechanically stable across demanding temperature cycles. Final operating limits should be reviewed with the window thickness, mount and coating design. A broad UV-to-infrared transmission range supports visible inspection, flame sensing, pyrometry and selected IR monitoring applications. For material selection guidance, review sapphire optical glass and related custom optical components. Material, mount clearance and thermal-cycle requirements are reviewed together before the drawing is released for production. Diameter, thickness, holes, steps, chamfers and edge profiles are machined to suit the sensor housing and sealing method. Sapphire is selected where the optical interface must tolerate abrasion, pressure or chemically demanding process conditions. Share wavelength, operating temperature, pressure, atmosphere, mounting method and target quantity. Engineers confirm feasible dimensions, tolerances, polish requirements and coating band. Sample parts are machined, polished and inspected against the approved specification. Approved process controls support small batches and ongoing OEM supply. Provide the drawing or diameter, thickness, clear aperture, tolerance, wavelength, coating, operating temperature, pressure, sealing method and annual quantity. Yes. CNC machining can support holes, steps, chamfers and drawing-defined profiles, subject to geometry and tolerance review. The safe rating depends on the sapphire part, coating, mount, seal, pressure differential and heating or cooling rate. These conditions should be reviewed as one assembly. Yes. Share the operating band, incidence angle and environmental conditions so the coating can be evaluated for the optical and thermal requirement. Send the sensor-window drawing and operating conditions. Felix Glass will review material, geometry, polishing, coating and inspection requirements for a manufacturable proposal.
Sapphire window engineering for harsh sensing environments
Sapphire Optical Window for High-Temperature Industrial Sensors
Mohs 9 surface hardness
High-temperature material stability
Drawing-based OEM machining
Interest
Why Sapphire Is Used in High-Temperature Sensor Windows
Thermal Stability
Useful Optical Transmission
Interest
Custom Specification Options
Material Optical-grade single-crystal sapphire (Al2O3) Geometry Round, square, rectangular, stepped, drilled or drawing-defined Optical Finish Double-side polish with surface quality and flatness defined by the application Edge Work Fine ground, polished, chamfered, beveled or stepped edges Coating Application-specific AR or IR coating reviewed by wavelength, angle and temperature Inspection Dimension, visual quality, surface finish and optical checks per agreed drawing
Desire
Built Around the Sensor Assembly, Not a Generic Stock Window
High-Temperature Validation
Precision CNC Machining
Harsh-Environment Protection
Desire
OEM Manufacturing Workflow
Application Review
Drawing and Coating Review
Prototype and Inspection
Repeatable Production
Action
Engineering FAQ
What information is needed to quote a sapphire sensor window?
Can the window include holes, steps or a special edge?
How should the temperature rating be specified?
Can AR coating be customized for a sensor wavelength?
Action
Contact Engineering
Request a Grade-A Engineering Review
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- T/T, L/C, D/P D/A, MoneyGram, Credit Card, PayPal, Westem Union, Cash, Escrow